CN113264773A - Method for preparing lithium ion battery cathode raw material by regeneration - Google Patents
Method for preparing lithium ion battery cathode raw material by regeneration Download PDFInfo
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- CN113264773A CN113264773A CN202110578672.0A CN202110578672A CN113264773A CN 113264773 A CN113264773 A CN 113264773A CN 202110578672 A CN202110578672 A CN 202110578672A CN 113264773 A CN113264773 A CN 113264773A
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000002994 raw material Substances 0.000 title claims abstract description 23
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 19
- 230000008929 regeneration Effects 0.000 title claims description 12
- 238000011069 regeneration method Methods 0.000 title claims description 12
- 238000002156 mixing Methods 0.000 claims abstract description 32
- 239000010426 asphalt Substances 0.000 claims abstract description 22
- 238000002360 preparation method Methods 0.000 claims abstract description 17
- 239000000571 coke Substances 0.000 claims abstract description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 238000004898 kneading Methods 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 238000000465 moulding Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000011049 filling Methods 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- 230000002265 prevention Effects 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 239000010406 cathode material Substances 0.000 abstract description 3
- 230000001172 regenerating effect Effects 0.000 abstract description 3
- 238000000748 compression moulding Methods 0.000 abstract description 2
- 238000001035 drying Methods 0.000 description 10
- 239000007773 negative electrode material Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 229910021383 artificial graphite Inorganic materials 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 229910021382 natural graphite Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
- C04B35/528—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components
- C04B35/532—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components containing a carbonisable binder
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/608—Green bodies or pre-forms with well-defined density
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention belongs to the technical field of preparation of cathode materials, and particularly relates to a method for regenerating and preparing cathode raw materials of a lithium ion battery, which comprises the following preparation steps: the method comprises the following steps: tracking and collecting the superfine tailings of the cathode raw material in the crushing process of special equipment; step two: taking a carbon production kneading pot as mixing equipment, mixing the superfine tailings collected in the step one with asphalt, and mixing the superfine tailings, namely the asphalt, at a ratio of 60-90: 40-10; step three: and (5) forming the mixture obtained in the second step by using a hydraulic compression molding machine, wherein the size of a forming block is arbitrary. The invention mixes the superfine tailing with certain asphalt to prepare paste with certain adhesive property, presses the paste into blocks by a press, then puts the blocks into a carbon baking furnace with the temperature of about 1000 ℃ to bake under the condition of basically isolating air, and prepares coke blocks with certain volume density, mechanical strength and low volatile.
Description
Technical Field
The invention belongs to the technical field of preparation of cathode materials, and particularly relates to a preparation method for regeneration of a cathode raw material of a lithium ion battery.
Background
The negative electrode of the lithium ion battery is formed by uniformly coating a paste adhesive prepared by mixing a negative electrode active material carbon material or a non-carbon material, a binder and an additive on two sides of a copper foil, drying and rolling; the negative electrode material is a main body for storing lithium of the lithium ion battery, so that lithium ions are inserted and removed in the charging and discharging processes; the negative electrode materials mainly used at present are natural graphite and artificial graphite, wherein the natural graphite is mainly used in the 3C field, and the artificial graphite is mainly used in the power field.
A large amount of superfine tailings which have no use value basically are generated in the preparation process of the lithium ion battery material, the superfine tailings are generally used as fuel at present, the value is not high, in order to save resources and maximize the value, the superfine tailings are used as raw materials and are regenerated to prepare the raw materials of the cathode material, but the superfine tailings have too small granularity and low stacking density and are difficult to treat, and the value is reduced by direct combustion; the low resource consumption is a great waste, so the invention provides a preparation method for regenerating the cathode raw material of the lithium ion battery.
Disclosure of Invention
To solve the problems set forth in the background art described above. The invention provides a preparation method for regenerating a lithium ion battery cathode raw material, which solves the technical problems that superfine tail powder is too small in granularity, low in stacking density, difficult to process, low in value due to direct combustion and relatively wasteful in resource low and low consumption.
In order to achieve the purpose, the invention provides the following technical scheme: the preparation method for the regeneration of the cathode raw material of the lithium ion battery comprises the following preparation steps:
the method comprises the following steps: tracking and collecting the superfine tailings of the cathode raw material in the crushing process of special equipment;
step two: taking a carbon production kneading pot as mixing equipment, mixing the superfine tailings collected in the step one with asphalt, and mixing the superfine tailings, namely the asphalt, at a ratio of 60-90: 40-10;
step three: molding the mixture obtained in the second step by using a hydraulic molding machine, wherein the size of a molding block is arbitrary;
step four: and placing the formed block into a container or directly and orderly placing the formed block into a roasting furnace, roasting at the temperature of 800-1200 ℃, cooling to obtain a product regenerated coke block, and filling the periphery of the formed block with materials such as yellow sand or metallurgical coke.
Preferably, in the first step, in the process of collecting the superfine tailings, moisture-proof work and pollution prevention work are well performed.
Preferably, the mixing temperature in step two depends on the softening point (T) of the asphaltSP) The mixing temperature is determined to be 50-80 ℃ higher than the softening point, and the mixing time is 40-70 min.
Preferably, the molded dimensions in step (a), including all measurable dimensions, have a bulk density of 0.5 to 1.5g/cm3。
Preferably, the distance between the blocky product obtained in the step three and the fire wall of the roasting furnace is not less than 80mm, and the roasting temperature range is 800-1200 ℃.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention mixes the superfine tailing with certain asphalt to prepare paste with certain adhesive property, presses the paste into blocks by a press, then puts the blocks into a carbon baking furnace with the temperature of about 1000 ℃ to bake under the condition of basically isolating air, and prepares coke blocks with certain volume density, mechanical strength and low volatile.
2. The invention collects the superfine tailing, mixes with the asphalt, presses the mixture into blocks and bakes the formed blocks, the superfine tailing is mixed with the asphalt evenly, and then forms and bakes the coke blocks with high value.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of the step structure of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1, the present invention provides the following technical solutions: the preparation method for the regeneration of the cathode raw material of the lithium ion battery comprises the following preparation steps:
the method comprises the following steps: the method comprises the following steps that the raw materials of the negative electrode are tracked and collected in the crushing process of special equipment, moisture-proof work and anti-pollution work are done in the process of collecting the superfine tailings in the first step, the moisture-proof work can ensure the drying of a working environment, a fan and drying equipment can be used for drying the working environment, the anti-pollution work can ensure that workers wear protective clothing at first, or the whole collection process is in a closed environment;
step two: mixing the superfine tailings and the asphalt collected in the step one by using a carbon production kneading pot as mixing equipment, and mixing the superfine tailings and the asphalt according to a ratio of the superfine tailings to the asphalt of 60-90:40-10, wherein the mixing temperature is (T)SP+60) deg.c and mixing time of 40 min;
step three: molding the mixture obtained in the second step by using a hydraulic molding machine, wherein the size of a molding block is arbitrary;
step four: and placing the formed blocks into a container or directly and orderly placing the formed blocks into a roasting furnace, roasting at the temperature of 800 ℃, cooling to obtain regenerated coke blocks of products, and filling the periphery of the formed blocks with materials such as yellow sand or metallurgical coke.
Mixing the superfine tailings with certain asphalt to prepare paste with certain bonding performance, pressing the paste into blocks by using a press, and then placing the paste blocks into a carbon baking furnace at the temperature of about 1000 ℃ to perform baking treatment under the condition of basically isolating air so as to prepare coke blocks with certain volume density, mechanical strength and low volatile component.
Specifically, the molding size in the step comprises all measurable sizes, and the volume density of the molding size is 0.5-1.5g/cm3。
Specifically, the distance between the blocky product obtained in the step three and the fire wall of the roasting furnace is 80mm, and the roasting temperature range is 800 ℃.
Example 2
Referring to fig. 1, the present invention provides the following technical solutions: the preparation method for the regeneration of the cathode raw material of the lithium ion battery comprises the following preparation steps:
the method comprises the following steps: the method comprises the following steps that the raw materials of the negative electrode are tracked and collected in the crushing process of special equipment, moisture-proof work and anti-pollution work are done in the process of collecting the superfine tailings in the first step, the moisture-proof work can ensure the drying of a working environment, a fan and drying equipment can be used for drying the working environment, the anti-pollution work can ensure that workers wear protective clothing at first, or the whole collection process is in a closed environment;
step two: mixing the superfine tailings and the asphalt collected in the first step by using a carbon production kneading pot as mixing equipment, and mixing the superfine tailings and the asphalt according to a ratio of 60-90:40-10, wherein the mixing temperature in the second step is (T)SP+70) deg.c for 70 min;
step three: molding the mixture obtained in the second step by using a hydraulic molding machine, wherein the size of a molding block is arbitrary;
step four: and placing the formed blocks into a container or directly and orderly placing the formed blocks into a roasting furnace to be roasted at the temperature of 1000 ℃, cooling to obtain regenerated coke blocks of products, and filling the periphery of the formed blocks with materials such as yellow sand or metallurgical coke.
Mixing the superfine tailings with certain asphalt to prepare paste with certain bonding performance, pressing the paste into blocks by using a press, and then placing the paste blocks into a carbon baking furnace at the temperature of about 1000 ℃ to perform baking treatment under the condition of basically isolating air so as to prepare coke blocks with certain volume density, mechanical strength and low volatile component.
Specifically, the molding size in the step comprises all measurable sizes, and the volume density of the molding size is 0.5-1.5g/cm3。
Specifically, the distance between the blocky product obtained in the step three and the fire wall of the roasting furnace is 120mm, and the roasting temperature range is 1000 ℃.
Example 3
Referring to fig. 1, the present invention provides the following technical solutions: the preparation method for the regeneration of the cathode raw material of the lithium ion battery comprises the following preparation steps:
the method comprises the following steps: the method comprises the following steps that the raw materials of the negative electrode are tracked and collected in the crushing process of special equipment, moisture-proof work and anti-pollution work are done in the process of collecting the superfine tailings in the first step, the moisture-proof work can ensure the drying of a working environment, a fan and drying equipment can be used for drying the working environment, the anti-pollution work can ensure that workers wear protective clothing at first, or the whole collection process is in a closed environment;
step two: mixing the superfine tailings and the asphalt collected in the first step by using a carbon production kneading pot as mixing equipment, and mixing the superfine tailings and the asphalt according to a ratio of 60-90:40-10, wherein the mixing temperature in the second step is (T)SP+80) deg.c for 70 min;
step three: forming the mixture obtained in the second step by using a hydraulic compression molding machine, wherein the size of a forming block is arbitrary and can be selected according to field equipment;
step four: and placing the formed blocks into a container or directly and orderly placing the formed blocks into a roasting furnace to be roasted at the temperature of 1200 ℃, cooling to obtain regenerated coke blocks of products, and filling the periphery of the formed blocks with materials such as yellow sand or metallurgical coke.
Mixing the superfine tailings with certain asphalt to prepare paste with certain bonding performance, pressing the paste into blocks by using a press, and then placing the paste blocks into a carbon baking furnace at the temperature of about 1000 ℃ to perform baking treatment under the condition of basically isolating air so as to prepare coke blocks with certain volume density, mechanical strength and low volatile component.
Specifically, the molding size in the step comprises all measurable sizes, and the volume density of the molding size is 0.5-1.5g/cm3。
Specifically, the distance between the blocky product obtained in the step three and the fire wall of the roasting furnace is 150mm, and the roasting temperature range is 1200 ℃.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The regeneration preparation method of the lithium ion battery cathode raw material is characterized by comprising the following steps: the preparation steps are as follows:
the method comprises the following steps: tracking and collecting the superfine tailings of the cathode raw material in the crushing process of special equipment;
step two: taking a carbon production kneading pot as mixing equipment, mixing the superfine tailings collected in the step one with asphalt, and mixing the superfine tailings, namely the asphalt, at a ratio of 60-90: 40-10;
step three: molding the mixture obtained in the second step by using a hydraulic molding machine, wherein the size of a molding block is arbitrary;
step four: and placing the formed block into a container or directly and orderly placing the formed block into a roasting furnace, roasting at the temperature of 800-1200 ℃, cooling to obtain a product regenerated coke block, and filling the periphery of the formed block by adopting materials such as yellow sand or metallurgical coke.
2. The method for preparing the lithium ion battery cathode raw material in a regeneration mode according to claim 1, wherein the method comprises the following steps: and in the first step, in the process of collecting the superfine tailings, moisture-proof work and pollution prevention work are well performed.
3. The method for preparing the lithium ion battery cathode raw material in a regeneration mode according to claim 1, wherein the method comprises the following steps: in the second step, the mixing temperature is determined according to The Softening Point (TSP) of the asphalt, the mixing temperature range is 50-80 ℃ higher than the softening point, and the mixing time is 40-70 min.
4. The method for preparing the lithium ion battery cathode raw material in a regeneration mode according to claim 1, wherein the method comprises the following steps: the molding size in the step comprises all measurable sizes, and the volume density of the molding size is 0.5-1.5g/cm3。
5. The method for preparing the lithium ion battery cathode raw material in a regeneration mode according to claim 1, wherein the method comprises the following steps: the distance between the blocky product obtained in the step three and the fire wall of the roasting furnace is not less than 80mm, and the roasting temperature range is 800-1200 ℃.
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| CN104916844A (en) * | 2015-04-24 | 2015-09-16 | 田东 | Method using artificial graphite fine powder subjected to doping processing as anode material |
| US20160251740A1 (en) * | 2015-02-28 | 2016-09-01 | Microvast Power Systems Co., Ltd. | Method for recycling electrode materials of lithium ion batteries |
| CN106785163A (en) * | 2016-11-29 | 2017-05-31 | 荆门市格林美新材料有限公司 | The method of reparative regeneration graphite negative material of lithium ion battery |
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2021
- 2021-05-26 CN CN202110578672.0A patent/CN113264773A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160251740A1 (en) * | 2015-02-28 | 2016-09-01 | Microvast Power Systems Co., Ltd. | Method for recycling electrode materials of lithium ion batteries |
| CN104766964A (en) * | 2015-04-24 | 2015-07-08 | 田东 | Method for using natural graphite fine powder as negative pole material by doping treatment |
| CN104766955A (en) * | 2015-04-24 | 2015-07-08 | 田东 | Method for recycling natural graphite fine powder as negative pole material |
| CN104766954A (en) * | 2015-04-24 | 2015-07-08 | 田东 | Method for recycling artificial graphite fine powder as negative pole material |
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Application publication date: 20210817 |